NIC porblem with Fedora Core 7

I cannot get eth0 to activate under fedora core 7. It had worked just fine under 3. My configuration had my DSL modem going to a netgear wireless router. I have the core 7 box pugged in to port two on the back of the router, the same place it was under 3. I am currently trying to use DHCP. Once I get a connection established I can start pulling down all my updates, I know there will be a ton for 7. I was expecting a lot of glitches but not one involving a NIC that had been reconized in a prior version. Perhaps I am forgetting something as it has been awhile since I installed 3.

I think the problem goes deeper. I don't think fedora core 7 is recognizing my NIC. Are there any tests I can perform, or any particular RPMs I can download.
Once I get over this hurtle I can utilize Yum to update my system.

I am currently back to a static IP address and I can ping myself but I can not ping the gateway. my address is 192.168.0.50 and the gateway is at 192.168.0.1. I can also ping the localhost. In this case ifconfig eth0 up 192.168.0.50 did nothing useful. I checked the man page for ifconfig is that what you meant as there is no man page for ispconfig or lspconfig considering my pervious error.

Thanks for your help, I have solved the issue. After learning that I could get it to work when it is directly connected to the DSL modem I reexamined the patch cords. The Fry's special cat-6 patch cord I had used with Fedora Core 3 would not work with Fedora Core-7. I swapped it with the XP box that was able to use it and switched up on the Fedora box to a cat-5e cross over cable. Now I am on line. I am not sure though I had been under the impression that the cat-6 was a crossover. As I do not have any diagnostic tools to tone out the cable I will just leave it at that. Once again thanks!